Machine tool



Aug 20, E935. G. D. SUNDSTRAND MACHINE TOOL Filed March 22, 1930 5Sheets-Sheet 1l Aug Z, E935. GA D. SUNDSTRAND mms3@ MACHINE TOOL 5Sheets-Sheet 2 Filed March 22, 1930 m M m 1m Qw/ mw. p. d@ mm QQ .6. x11g Y il mm hw D mm @uw QN NN q M7 AU@ Z? w35 G. D. SUNDSTRAND 2,933,336

MACHINE TOOL Filed March 22, 1930 5 Sheets-Sheet 3 G. D. SUNDSTRAND Aug.20? i935.

MACHINE TOOL Filed Mar'Oh 22, 1930 5 Sheets-Sheet 4 TU Sundfam; @y MM/Mzgg,

Aug 2G 1935 I G. D. SUNDSTRAND 2,011,836

MACHINE TOOL Filed March 22, 1950 5 Sheets-Sheet 5 .94 122 123 I lzL l:25 4 |I 126 HUIHIMX 1. 19.5. Q u w) J I w) 136 @D .'5 w) l i 137 19o i l`l lQ Q @J I; 5 f lumuwuln 12@ 120157 Q) uw J 5 l 135 22u M n n." m KL39 116 9 13@ v! v lf@ 1 t 129 --//la ll Patented Aug. 20, 1935 UNITEDSTATES Ziiiilit MACHINE TOOL Gustaf David Sundstrand, Rockford, Ill.,assigno to Sandstrand Machine Tool Co., Rockford, Ill., Va corporationof Illinois Application March 22, 1930, Serial -Iilo.fl32 3v,008

i7 Claims.

More particularly theinvention relates vto a new and improved mechanismfor actuatingy tool and work supports of machine tools and forcontrolling the movements thereof. For purposes of illustration theinvention will be described as embodied in a milling machine but it isto be understood that it might equally Well be embodied as a who-le orin part in other types of machine tools for actuating and forcontrolling the movements of work and tool supports.

The general object ofthe invention is to provide an improved machineembodying a novel mechanism for actuating movable work and tool supportstogether With control means for the mechanism arranged to permit themachine tobe operated at maximum eiiiciency and lat high speeds with aminimum of wear and tear. H

Another object is to provide 'a milling machine having novel feedingmechanism for the work table which is conveniently ymounted for purposes of assembly, inspection and repair.

Another` object is to pro-vide a -novel control means for a mechanicalfeed box, `embodying a proved automatic means for controlling thestartfing and stopping of the tooll supporting member of the machine.

Further objects Vand advantages will become apparent from the followingdetailed description taken in connection with the accompanying'drawings, in which: f

Figure l is a side elevation of a milling machine embodying thepreferred form of the invention.

Fig. 2 is a plan View thereof. v

Fig. 3 is a horizontal section through the feed box, being approximatelyalong the line 3 3 of Figs. l and V5.

Fig; 4 is a vertical section along the line 4 4 of Fig. 3. v f

Fig. 5 isa vertical section along the line 5 5 of Fig. 3.

Fig. 6r is a `ffagmental vertical section approximately along the line 56 of Figs. 2 and 3, the control valve and pistonY and cylinders beingshown in their feed position.

' Figs. 6a and 6lo are vertical sections through the v control valve and-piston `and cylinder devices showing the valve Vand pistons in rapidtraverse and neutral positions respectively. v-Fig..7 is a fragmentaryplan View along th line 1 1 ofFig. 6. Fig. Sis a vertical section alongthe line 8 8 .of Fig. 2.

Fig. 9 is a vertical view partly in section, along the line 9 9 of Fig.3. v

While theinvention is susceptible of embodiment in many different forms,there is shown in the drawings and will herein be described in detailone such embodiment with the understanding thatthe present disclosure isto he con-` as illustrated in Figs. 1 and 2 comp-rises generallya'bed'or base i having a column 2 rising from one rear corner thereof`andV a horizontal Work support or table 3 slidably mountedrfor movementtransversely" in front of said column. A

saddle or head 4 is slidably mounted on thev j column 2 and is adaptedto be adjusted vertically by means including a manually operable feedscrew Fi. 'Ihis head has a tool or cutter spindle rotatably mountedthereon and supports an overarm 1 which' at its outer end may beprovided with one or more outboard bearing supports 8 forY the outer endof the cutter arbor (not shown). The tool spindle 6 is arranged to bedriven ,from a motor S by means of suitable gearing (Figs. 8 and 9)whichembodies a disconnecting or spindle clutch l l i and is hereinaftermore fully described. The table is actuated by power derived from themotor 9 through intermediate gearing which includes speed and directionchanging gearing contained in Va feed box IU positioned on the rear ofAthe b ed I to one sideof the column 2. It is to thedriving mechanism forthe work and tool supports and the means for controlling this mechanismthat the present invention is more particularly directed.

It will be readily apparent that with the feed `box vl!) positioned asillustrated in Figs. 1 and 2, it is readily accessible not only forpurposes of assembly but also for inspection and repair. Prefern ably itis( provided with a detachable cover li which closes the entire upperend of the box so thatwhen the cover is removed, the mechanism withinthe box is `fully exposed, much inthe manner illustrated in Fig'. 3. YThis position of the feed fio4 box also permits of a simplified drivingconnection to the table,A as hereinafter more fully described.

The invention in the exemplary form, contemf plates movement of table 3by mechanical means driven from the motor 9 and the provision of a novelhydraulically operated control mechanism for the mechanical clutches,which control mechanisrn may be operated manually by means of a controlhandle I2 positioned at the front of theV machine or by means of anautomatic trip mechanism actuated by dogs carried on the front edge ofthe table. sitioned principally within the feed box I and comprisesgenerally means for feeding the table at a slow rate in oppositedirections, suitable for cutting operations, or for traversing the tableat a rapid rate in opposite directions, suitable for advancing andreturning the table when no cutting is taking place.

This mechanism, in the form illustrated herein, includes a drive shaftI3 (FigjB) which is rotatably mounted within the feed box I0 and extendsforwardly from the rear of the machine. The

shaft is adapted to be driven positively from the l motor by means whichis independent of theY spindle clutch I II and includes a sprocket I4secured to the rear end of the shaft and a chain I4a (Fig. 2) connectingsaid sprocket with the drive sprocket H4. The power is transmitted fromshaft I3 to the table by means of clutches and gearing within the feedbox including a shaft l5 (Figs. 3 and 5) which extends parallel to theshaft I3 and out throughthe forward end wall of the feed box. At itsforward end this shaft is coupled to a worm I6 (Fig. 6) which isrotatably mounted on the bed I beneath thetable 3. The table, asmentioned hereinbefore is slidably mounted on the bed, being guided `formovement thereon by means of ways I7, and carries a nonrotatable feed.screwV I8. The worm Y lli meshes with a worm wheel IS which isrotatably mounted on the bed I and is provided with an interior f threadacting as a nut for the feed screw. The

' feed shaft I5 is` arranged to be driven at slowV The means for drivingthe shaft I5 at slow rates of speed for feeding the'table will first bedescribed. As illustrated most clearly in Figs.,8 and 4, this meansincludes a reversing feed .clutch element anda disconnecting feed clutch2l. The reversing clutch comprises a pair of oppcsitely positioned bevelgears 22 and 23 rotatably mounted within the feed box. by. means of ballbearings 24and 25 and having central bores through which the drive shaftI3 passes. These gears and the element 20 which is positionedintermediate the adjacent ends of the gears, are providedwithr clutchteeth 2G. Theclutch element is arranged to be shifted manually by meansof a control device 2'l mounted on the adjacent wall of the feed box,which device carries at its inner end an ec- Amay be driven in oppositedirections, through the The mechanical mechanism is po-V gear 22 or thegear 23. The upper end of the shaft 32 is preferably provided with aplurality of splines 34 to drive one gear 35 of a set of pickoff gears.The other gear 3S of this set is similarly mounted on the upper end of ashaft 3'! positioned adjacent and parallel to the shaft 32. The shaft3'1 is provided with a worm 3S which meshes with a worm wheel 39rotatably mounted on a horizontally extending shaft 4D. The worm wheelhas clutch teeth 4l (Fig. 3) on one end thereof which form one elementof the feed disconnecting clutch and are arranged to be engaged by theclutch 2l mentioned hereinbefore. The clutch element 2i is preferablysecured to the shaft 40 Yby means of a key 42 and a pin 43, the shaftbeing slidable longitudinally in its bearings 44 and 45 as well as beingrotatably mounted therein. As shown herein the clutch element 2| hasgear teeth 46 formed thereon which engage with an intermediate gear 4l'(Fig. 4) which in turn drives a gear 48 (Fig. 3) on the rear end of theshaft i5. Thus with the feed reversing clutch 23 engaged with either thegear 22 or the gear 23, the table is moved in the correspondingdirection whenever the feed clutch 2| is engaged.

The means provided'in the exemplary embodiment of the invention fordriving the shaft i5 at a traverse speed is illustrated most clearly inFigs.Y 3 and 5 and comprises a reversing traverse clutch having ashiftable element 59. A pair of spur gears 50 arid 5i' rotatably mountedon the shaft i5 have portions carrying elements of friction typeclutches 52 and 53 and are arranged to be drivenin opposite directionsfrom the drive shaft I3. As illustrated herein, the gear 59 is drivendirectly from the shaft I3 by means of a spur. gear 54 whereas the gear5I is driven in the opposite, direction by means of a spur gear 55 onthe shaft I3 and an intermediate idler gear 56 (Fig. 5). clutches 52 and53 are carried on the shaft I5 to rotate therewith, clutch 52 beingengaged when the element 4Q is shifted to the left (Fig. 3) and clutchv53 being engaged when the element 4S is shifted to the right.

In its preferred form, the invention embodies hydraulically operatedmeans for actuating the feed Vclutch 2l and the 'traverse reversingclutch 4S, this means being arranged so that the traverse reversingclutch is held in ,neutral when the feed clutch is engaged and so thatthe feed clutch is disengaged when the traverse clutch is engaged. Asillustrated herein, the means for actuating the traverse reversingclutch (Figs. 3 and 6) cornprises a piston 5T slidably mounted in acylinder 58. This piston cariesa pin 53, the free end of which extendsthrough a slot in the cylinder wall and is attached to a yokei engagingthe clutch element 49. The piston is normally held in its mid positionin the cylinder to maintain the clutch 49 in neutral. This may beaccomplished by means of a pair of coiled springs 6l and 52 positionedintermediate the opposite ends of the piston and the ends of thecylinder.

The feed clutch 2l is normally held in its disengaged position by meansof a coil spring 63 (Fig. 3) positioned partly in a recess in the lefthand end of shaft 40 with its outer end bearing against a detachableplate 54 secured to the end wall of the feed box lil. Ball bearings 5are preferably positionedv intermediate the ends of the spring and theshaft 45 and plate 54 so as to permit free rotation of the shaft. Thefeed clutch is arranged to be engaged bymeans cf a piston 66 (Figs. 3and 6) slidablein a cylinder 3i and hav- The other elements of thefriction ing a piston rodii extending 'through anvaperture in the leftend wall of the cylinder in axial alinementwith the shaft im. As will beapparent from Figf3, when the piston 5t is rnoved'to the left as shownin dotted'lines, the disk 59 secured on the end of thejpiston rodabutsthe end of shaft @t and slides said shaft together with the clutchEl carried thereby', Atoward the left. A bally thrust bearing lil ispreferably mounted `on the end of the shaft di! to permit free rotationof the shaft .with respect vto the disk t9;

' The 4pistons lill and iii are preferably arranged to be controlled bymeans of a unitary valve mechanism which is operable manually by rneansof the y within the casing ill arranged to be driven by the end of theshaft ltfand hasitsoutlet connected to the inlet port it by means of aconduit S3 (Figs. Band 5).- V'Ihe valve has a longitudinally extendingbore ,ll which receives the' fiuid from' the inlet chamber l5 Vthrougha'radial port in the valve intermediate the collars i3 aldl. l 'f l Thevalve casing 'il is provided with a port 1S communicating with the righthand end of the cylinder tl, aV port l@ communicating with the left handend of the cylinder 53, and a port Bil cornniunicating with the righthand end of' the cylinder sa The valve 'l2v is provided with deliveryports arranged to communicate with the ports l,

, l5 and @il respectively when the valve is in differrotatably supportedin a forwardly extending portion of the bed i so that the upper end ofthe shaft il@ is positioned adjacent the front longitudinal edge of thetable 3. The valve l2 is arranged to be operated by the handle l2 bymeans of an `arm Si (Figs. 6 and '7) secured'to the lowerv end of theshaft tt. and a rod iii?, pivotally connectedat its forward end tothefree end of the Y arm ill, and at its rear cnd,secured to the lowerend of a bar the upper end of which is attached to the valve. Thecontrol handle l2 is provided with five diifferentpositions as indicatedin Fig?. When ini'ts inidposition as illustrated, the table 3 will bemoved at a feed speed in the direction determined by the feed neversingTclutch On each of the-feed position of the handle are the rapidvtraverse positions and beyond the rapid traverse positions are twoneutralpositions. Thus the handle has five different positionscorresponding to liive different positions of the valve l2.

With the control handle i2 in itsmid position as shown in Figs. 5 and 7,the valve 'l2 isin position to admit pressure fluid'(preferably cil) tothe cylinder El to Aforce thepiston (it to the left and engage thefeedclu'tclr.v The reversingl travmeans Yof. the springs Si, 62, theopposite ends of the cylinder `58 being then connected to exhaust. Theexhaust rpassage from'v the right hand end of the cylindercomprisesthe-port liLa chamber surrounding the valv-e'nieinberintermediate the collars Ili and 83 and an exhaustport .Sii in thevalvecasing li. rThe exhaust passage from the left hand end ofthe'cylinder 58 comprises a longitudinally extending passage @l in thecylinder 5l, the port "i9, a chamber Sl vformed between the collarsl'l'and 82 of the valve member and an exhaust port 99 in the valvecasing.` f

Fig. @illustrates the'positions of the valve and pistons when thecont'rolhandle l2 is moved to a rapid traverse position whereas 'Fig'.6b illustrates the positions of the parts when the control handle l2 hasbeen moved to a neutral position to stop the table.r `vWhenthe parts`are`,.as`in Fig. 6e, theright hand end ofthe cylinder t1 is connectedtofexhaust througha passage comprising the port l5, a chamber H30 formedbetween the collarsl and 82 of the valve member and an exhaust port lillin the valve casing'll. The left hand end of the cylinder 53 exhaustsas-de'scribed hereinbefore, duid under pressure being admitted to theright hand end of cylinder 53 through'the ports 86 and 8ll. With thevalve as illustrated in- Fig. 6b, both ends of the cylinder 5t areconnected to exhaust, the right hand` end -of the cylinder thenexhausting through port 8e and the open end l G2 of the valve casing ll. It will be apparent that by moving the handle lf2'` in the oppositedirection so as to actuate the valve i i toward the right f rcrntheposition shown in Fig. 6, the movement of the piston 5l will be in theoppositedirection from that shown `in Fig. "6e for therapid traversemovement of the table and the pistons will be in the same positions asshown in Fig. 6b' when. the control handle I2 is in the other neutralposition. v

A trip: device ispreferably provided for controlling the table movementsautomatically. In its preferred form, this device .includes the ver'-tical shaft `Si! (Figs. 6 and 7) which has a radially extending arm 495on the upperend thereof. The

' free end of this arm carries aV roller |65 which may be engagedby one"cr more 'dogs secured to the forward edge of thetable 3 to actuatethevalve l2 automatically.

'As illustratedin Figs. l, 2, 6 and 7, dogsare provided sothat ifthe'han'dle l2 is rst moved manually to its rapid approach position R(Fig. 7) the table t will movedownwardly (Figs. 2 and '7) until a feedldog' Il engages the roller |96 and movesthe'tripfdevice to the feedposition Fas shown in Figs. Zand 7. Thereupon the table will continue tomove downwardly at a feed speed until a traverse dog itiilengagesvthe.roller 5&5 to move the handle l2 bac'kf to its-rapid approach positionR. TheA table will then move rapidly in the downward direction (Figs.`2and 7) until a second feed dog lill engages the'roller` H35 and movesthe 'control handle toits feed-position F.

The table will kthen continue to move dowrnvard-` ly at a feed speeduntila return traverse dog lima v engages the roller IE6 and actuatesthetrip device` to place thecontrol handle l2 in its rapid return positionR1. The table willthen Vmove upwardly at a traverse rate'until a stopdog it@ engages the trip device and moves the control yhandle l2 intotheneutral position Nij n j f This cycle is arranged for what iscommonly termed as fintermittent milling, the table traveling at "a slowrate'of speed between thedogs le? erse clutch is then held its neutralpositionby and |08 while the cutter is operating on one piece of work orone portion of a piece, and again moving ata slow ratebetween the second'dog feed |01 and the return traverse dog |08 while the cutter isoperating on another piece of work or another portion of the same piece.I f merely a single Work piece is to be operated upon the rapid approachdog |08 and the second feeddog |01 may be removed, whereupon the tablewill be actuated through a cycle comprising rapid approach, feed, rapidreturn and stop. It is of course contemplated that other arrangements ofdogs may be provided to obtain other operating cycles, those illustratedherein being merely illustrative of well known cycles.

As mentioned hereinbefore the invention in its preferred formcontemplates also means for auto.- matically controlling thetransmission of power tothe rotating spindle 6. The gearing between theprime mover and the spindle is mounted principally in a casing III)(Figs. 2, 8 and 9) which is mounted in the base I of the machine in aposition such lthat a main drive pulley II2 mounted on a shaft I3 in thecasing, is adapted to be belted to the pulley of the motor 9. Power istransmitted to the shaft I3 by means including a sprocket ||4 and acha-in I4EL (Fig. 2) connecting said sprocket with the sprocket I4. The`exemplary form of gearing to the spindle comprises (Figs. 8 and 9) ashaft II5 positioned above and parallel to the shaft I3, gears II6 and||1 connecting the shaft II with one element of the clutch III, bevelgears II8, IIS and comprising a reversing clutch for the spindle havingan actuating 'element I2I keyed to the shaft I|5, a short vertical shaft|22V carrying the bevel gear I I9 and pickoff gears I23 and |24connected one to the vertical shaft |22 and the other to a parallelvertical shaft |25. A vertical drive shaft |26 which extends upwardly todrive the spindle 6 is driven from the shaft by means of a pair of gears|21 and |28. A cutter coolant pump (not shown) may be driven from theshaft I I5 by means of a sprocket II5a (Fig. 9) so as to beVstarted-andstopped with the spindle 6.

The spindle disconnecting clutch II I is arranged to be actuated bymeans of a clutch element |29 operable by means of a yoke |30 which isslidably mounted on a rod I3I. The yoke |30 may be provided with a rackI 32 with which a pinion |33 meshes. This pinion is mounted on a shaft|34 and is arranged to be operated by the feed clutch piston 66 ashereinafter more fully described. The clutch element |2| of the spindlereversing clutch is arranged to be operated manually by means of a yoke|35 slidably mounted on a rod |36. yA knurled knob |31 rotatably mountedon a plate |38 secured to the side wall of the casinggIID carries aneccentric pin |39 on the inner end thereof engaging a vertical slot inthe yoke |35. This permits the clutch element I 2| tol be shifted intoengagement with either the gear IIB or the gear |20.

The piston 66 is also arranged tocontrol the starting and stopping ofthe spindle 6, so that ythe spindle will beV stopped just after the feedclutch 2| is disengaged and Vwill be started just before the feed clutchis engaged. As illustrated herein (Figs. 3 and 5) a short Yshaft |4I isrotatably mounted in the rear wall vof the casing I0 and carries on itsinner end an arm |42. A pin 43 is pivotally secured to the lower end ofsaid arm and provided with a slot |44 which engage-s the disk 69 on thepiston rod 68. Thus when the piston 66 is actuated it operates the shaftI4I. The outer end of the shaft |4| carries an arm |45, the free end ofwhich is connected to one end of a link |46. The other end of the link|46 is connected to one end of an arm |41 mounted on the end of theshaft |34 (Fig. 8) so that motion is transmitted from the shaft I4| tothe shaft |34.to actuate the spindle disconnecting clutch III. Y

I claim as my invention:

l. A machine having, in combination, a base,

Va support slidably mounted on said base, means for moving said supportincluding a feed clutch,

and a reversing traverse clutch, pressure fluid.

actuated means for controlling the operation of said clutches, a controlValve for said means, a trip device adjacent one edge of said supportconnected to said valve and movable into any one of a plurality ofpositions corresponding to the positions of said valve, a manual controlhandle whereby said valve may be moved into a position to engage saidtraverse clutch andv cause said support to move rapidly in onedirection, a dog movable with said support adapted to actuate said tripdevice to move said valve into a position to engage said feed clutch andcause said support to move slowly in the same direction, a second dogmovable with said support arranged to actuate said device to move saidvalve to shift said traverse clutch into'its reverse position andthereby rapidly return said support and a third Ydog movable with saidsupport operable duringV said return movement to actuate said tripdevice and move said valve to disengage said traverse clutch and stopthe support. y

2. A machine` having, in combination, a base, a support slidably mountedon said base, means for moving said support including a feed clutch anda reversing traverse clutch, means for controlling the operation of saidclutches comprising a piston and (cylinder device, one element of whichris stationarily mounted and the other connected to operate said traverseclutch, a second piston and cylinder device, one element of which isstationarily mounted and the other arranged to operate said feed clutch,a control valve for said devices, a trip device connected to said valvemovable into any one of a plurality of positions corresponding to thepositions of said valve, a manual control handle whereby said valvemaybe operated, a dog movable with said support adapted to actuate saidtrip device to move said valve into a position to engage said feedclutch, a second dog movable with said support arranged to actuate said'device to move said valve to engage said traverse clutch and a thirddog movable with said support operable to actuate said trip deviceand'move said valve to disengage said traverse clutch.

3. A machine having, Vin combination, a base, a

. support slidably mounted on said base, means for moving said supportincluding a feed clutch and a forward and reverse traverse Vclutchhaving a neutral intermediate position, means normally holding saidtraverse clutch in its neutral position, means for controlling theoperation of said clutches comprising a piston and cylinder device foreach clutch, a unitary control valve for said deviceshavingforward-traverse, feed, reversetraverse and stop positions in the ordernamed and arranged to engage said feed clutch when the traverse clutchis in, its neutral position, a. trip device connected to said valvemovable into any one of a plurality of positions corresponding to thepositions Vof said valve, a manual control handle whereby said valve maybe operated and Lif) Vdogs movable with said support adapted to actuatesaid trip device.

verse traverse clutch, means for controlling the Y operation of saidclutches including a piston and cylinder device, one elementof whichisconnected to operate and maintain the engagementof said traverseclutch, a single control-valve for said means havingforward-traverse,feedandreversetraverse positions, a trip deviceconnected to said valve movable into any one of a plurality' ofpositions corresponding to the positions of said valve and means forautomatically actuating said trip device. y

5. in a machine tool, in combination; a movablel support, mechanicalmeansy `for actuating said support including a forward and reversetraverse clutch, a feed clutch arranged to be engaged when said traverseclutch is in its neutral position and means for reversing the directionof drive of said feed clutch, pressure fluid operated means forcontrolling said clutches, a five position valve for said means havingstop, forwardtraverse, feed, reverse-traverse and stop positions,manually operable control means for said valve and means for manuallyreversing said feed drive reversing means independently of said controlmeans. A

6. In a machine tool, in combination, amovable support, transmissionmechanism for actuating said support including a forward and reversetraverse clutch shlftable to rst, second and intermediate positionsrespectively productive of different effect from said transmission and afeed clutch arranged to be engagedwhen said traverse clutch is in itsintermediate position, means nor-l mally'holding said traverse clutch inits neutral position, pressure fluid operated means for controlling saidclutches, a five position valve for said means'having stop,forward-traverse, feed, reverse-traverse and stop positions in the ordernamed, and means carried by said support for automatically shifting saidvalve.

7. In a machine tool, in combination, a movable support, mechanicalmeans for actuating Vsaid support including a forward and reversetraverse clutch and a feed clutch jointly shiftable to cause saidactuating means to effect forward-traverse, feed, reverse-traverse andstop,

pressure fluid operated means for controlling clutch and a reversingclutch, means for controlling the operation of two of said clutchescomprising a piston and cylinder device, means for controlling the otherclutch comprising a second piston and cylinder device, a unitary controlvalve for said devices, trip mechanism connected to said valve and meanscarried on said support to actuate said trip mechanism.

9. A machine tool comprising, in combination,

' a rotatably mounted spindle, a slidably mounted support, means foractuating one of said elements including a` first clutch,- means rforactuating the otherof said elements comprisinga feed clutch and areversing v'traverse clutch, means for controlling. the operationof-said rst clutchand said feed clutch comprising AaAV piston andcylinder device, means for controlling said 'reversing clutchco'mprisinga second piston and cylinder device, a unitary control valvefor said devices, tripmechanism for shifting said valve,

and means operable through the support actuating means to actuate saidtrip mechanism.

y'10. A machine tool comprising, in combination, a `rotatablymounted'spindle, a slidably vsaid elements including a first clutch,vmeans for actuating the other of said elements comprising a feed clutchand a reversing traverse-clutch, means forv controlling the voperationof two of said clutches comprising a single piston and cylinder device,a control valve for said device, trip mechanism for shifting said valveandmeans operable through one of said-actuating means for actuating saidtrip mechanism.

11. A machine tool comprising, in combination, a rotatably mountedspindle, a slidably mounted support, meansfor actuating said spindleincluding a first clutch, means for actuating said support including afeed clutch and a reversing traverse clutch, means for controlling theoperation of said feed clutch and said first clutch comprising a singlepiston and cylinder device, means for controlling said reversing clutchcomprising a second piston and cylinder device, a unitary control Valvefor said devices, trip mechanism connected to operater said valve andmeans carried on said support to actuate said trip mechanism.

l2.`In a machine tool, in combination, a tool support, a work support,means for actuating said tool support including a disconnecting lclutch, means for actuating'. said work support including adisconnecting clutch, means including a piston and cylinder device foractuating said clutches arranged to engage said clutches when moved inone direction and to disengage said clutches when moved in the oppositedirection and a Valve for controlling said piston and cylinder device;

13. A machine tool comprising, in combination, a rotatably mountedspindle, a slidably mounted support, means forv actuating said spindleincluding aV disconnecting clutch, a transmission for actuating saidsupport including a Yfeed train and a rapid traverse train in paralleltherewith and terminating in a common drive member for the support, saidfeed train including a disconnecting clutch and said rapid traversetrain including a reversingclutch, and control mechanism for saidclutches comprising a first piston and cylinder device for controllingsaid spindle clutch and said feed disconnecting clutch, a second pistonand cylinder device for controlling said traverse reversing clutch, asingle control Valve Afor said devices, and means for shifting f saidvalve.

14. In a machine tool in combination, a movable support, transmissionmechanism for actuy ating said support including a forward and reversetraverse clutch and a feed clutch jointly shiftable to four positionsrespectively productive of different effect from saidtransmission,pressure fluid operated means for shifting said y clutches to any ofsaid positions, and a valve able to diierent positions respectivelyindividual to the different clutch positions.

15. In a machine tool in combination, a movable support, transmissionand control mechanism for actuating said support including a feed trainand a rapid traverse train in parallel therewith and terminating inagcommon drive member for said support, said feed train including. atwo-position disconnecting clutch, said rapid traverse train includingathree-position reversing clutch, pressure fluid operated means foractuating said clutches, a ve-position valve for said pressure iiuidmeans havingistop,rforward traverse feed, reverse-traverse and'stoppositions in the order named, and means for shifting said valve tovarious of said positions to obtainthe desired cycle. l l

16. In a machine tool, in combination, a movable support, transmission'and control mechanism for actuating said support including paralleltrains terminating in a common drive member, a clutch inone of saidtrains for connecting or disconnecting the same from said common drivemember, a reversing clutch in the other of lsaid trains, pressure'fluidoperated means for' actuating said clutches, a single valve forcontrolling said pressure fluid means, and means for shifting saidvalve.

17. Ina machine tool, in combination, a movable support, transmissionand control mechanism `for actuating said support' including a feedtrain and a traverse train parallel with the feed train and terminatingin a common drive member for the support, said feed train including adisconnecting clutch and said traverse train including a reversingclutch having an intermediate neutral position, a piston and cylinderdevice for actuating the disconnecting clutch in said feed train, asecond piston and cylinder device for actuatingthe reversing clutch inthe traverse train, a single valve for controlling said pistonandcylinder devices having a plurality of positions respectivelyindividual to different positions of said disconnecting and reversingclutches to obtain different effectfrcm the transmission, and means forshifting said Valve.

GUSTAF AVID SUNDS'IRAND.

